Finally, after 99 hours I completed this game. My Digimon were:
Kotemon level 57
Renamon level 43
Veemon level 43
I beated Gallacticmon with only my Kotemon (ImperialDramon PM) and was able to see the credit of this game. I also defeated every Digimons (boss) and did every sidequests. This is a Great game with a great story line. I'm looking to play it again one day.

First console RPG I ever owned.
For a long time, I didn't have a memory card, so I played as long as I could, leaving my PS2 on overnight at times. Then I got my memory card, and actually *gasp!* finished this game.
First time through, I used Monmon, Renamon, and Agumon, levels 63, 32, and 12. XD Guess I trained Monmon a lot more than the others. Now I'm playing through again with Kotemon, Patamon and Renamon, but I think I'm going to trade Patamon for my Veemon, since I'm more fond of using brawlers than mages.